Weatherproof pump motor



June 17, 1930.

C. E. JOHNSON WEATHERPROOF PUMP MOTOR Filed Sept. 15, 1926 2Sheets-Sheet l CARI E ./0H SON 5 %iT/%% w I T ORNEK June .17, 1930. Q c,JQHNSQN 1,764,793

WEATHERPROOF PUMP MOTOR Filed Sept. 15, 1926 2 Sheets-Sheet 2 TOR O614;?4 .r/OH 50 ORA/EX Patented June 17, 1930 {UNITED STATES PATENTOFFICER CARI E. JOHNSON, OF LOS ANGELES, CALIFORNIA, ASSIGNOR TO UNITEDSTATES ELEC- TBICAL UFAGTURING COMPA TION OF CALIFORNIA NY, OF LOSANGELES, CALIFORNIA, A CORPORA- WEATHERPROOF PUMP MOTOR Applicationfiled September 15, 1926. Serial No. 135,671.

This invention relates to electric motors and particularly to turbineirrigation pump head constructions. s In the past and at the presenttime itis ordinary practice to protect the pump head of a turbineirrigation pump by enclosing it in a small pump house. It is thetendency however to do away with the pump house in order to decreaseexpenses, this subjecting the pump head to the rain, sun and otherelements. It is very important that the driving motor of the pump headbe protected from .the elements, especially from rain and moisture whichare capable of doing considerable damage to the windings of the motor.

It is an object of this invention to provide a pump head constructionfor turbine irrigation pumps in which the motor is adequately protectedfrom the elements.

Fig. 3 is a section taken on the line 33 of Fig. 2.

Fig. 4 is a section taken on the line 44 of Fig.

Fig. 5 is a vertical section taken through a second form of theinvention.

Referring to the drawings and particularly to Fig. 1, the numeral 11represents a pump head which is mounted at the upper end of a well 12.Placed in the well 12 near the lower end thereof, below the water level,

It is quite essential that the motor have is a pump section 13. The pumpsection 13 is attached to the lower end of a discharge pipe 14 whichextends upward through the well 12 to the surface of the ground where itis connected to the pump head 11. The pump head 11 consists of a body16, to the interior of which the discharge pipe 14 is connected, and adrive means in the form of a motor 17. The motor 17 as shown in Fig. 1is provided with a protective jacket 18cmbodying the features of theinvention.

Referring to Figs. 2 to 4 inclusive, the details of the invention willbe described. The motor 17 consists of a lower frame 20 which issupported by the body 16. Resting on a shell portion 21 of the lowerframe 20 and secured thereto by bolts 22 is a stathe upper frame 25.Extending through the bearlng chambers 27 and 30 is a pump shaft 33which extends from the pump head 11 to the pump section 13 in the well12. Situated in an opening 34 of the stator 23 is a rotor 35. The rotor35 is secured on a quill 36 which surrounds the shaft 33 as shown. Theupper end of the quill 36 is attached to a thrust block 38 as shown sothat the thrust block will be driven by the rotor 35 through the quill36. 'The thrust block 38 is supported by the thrust bearing 31 and isdrivably attached by a nut 39 to the shaft 33.

The walls 32 of the upper end of the frame 25 are closed by a covermember 40 which is secured in place by bolts42. The cover memsurroundingthe motor 17 with the exception drical portion 45, this radial wall 46being annular and extendin above the lower edge thereof.

. forme inward. The top frame 25 is provided with a shell portion 48havin flat faces 49 where the bolts 26 extend theret rough, and on theseflat faces 49 the jacket 18 is sup orted by ,en agement of the ower faceof the radial wal 46 therewith. Extending upward from the inner edge ofthe radial wall 46 is an annular flange 50.

. The'upper end of the annular flange 50. ro-

jects inside the rim 43,- terminating1 slig tly' T e motor 17 isentirely protected from'thesun since the enclosure consisting of the rim43 and the jacket 18 is complete. The motor 17 is protected frommoisture and rain by reason of the fact that there are no upwarddirected openings through which moisture or rain may pass in order toenter the motor. There are however openings which provide a thorou h andefficient ventilation for the motor. eferring to Fig. 2, air may n enterthe lower part of the'motor throu h openings 55' in the shell 21as inicated by the arrow 56,being circulated by a lower.fan

I 56. The air may circulate through the motor and pass from the interiorthereof as indicated by'the arrows 57 Air is also drawn inward at theupper endof the .motor. by an upper fan 58, as indicated by arthroughopeningsrows 59, the air passin 60 in the upper shell. T e air flowsoutward from the motor as indicated by arrows 61. The lower ,end of thecylindrical portion 45 of the jacket 18 is open so that air may movedownward inside of it as indicated by the arrow 62. In Fig}. 5 Iillustrate a form of my invention aving a secondary jacket 70. In thisform of the invention the cylindrical wall 45 of the jacket 18 maybeshortened as shown.

From the foregoing description the'advantages of the invention areobvious. The jacket 18 assisted by the rim 43 provides completeprotection from the elements. parts are so constructed that a thoroughventilation may be established even though the motor is entirelyprotected from the elements.

cheaper. The cost of the jacket 18 and of providing the rim 43 on thecover 40 is considerably less than the cost of the usual pump house.

I claim as my invention:

1. In combination: a stator; a rotor inside said stator; means forsupporting said rotor;

These The invention eliminates the neces-- sity for a pump house and isdecidedly a-frame for supporting said'stat or; aweatherroof coverattached to the upper end of said rame and covering said means forsupporting said rotor, said cover 'havin an annular rim; a jacketsupported by sai frame, said jacket surrounding said stator and havingan annular flange extending upward-and ter' minating beneath said rim; alower fan for drawing air inward through the lower part of. said frameand forcing it outward-into a space between said stator and said jacket;and an upper fan for drawing air into said motor between said flange andsaid frame and forcing it outward into said space between said statorand said jacket.

2. In combination: a stator; a rotor inside said stator; means forsupporting said rotor; a frame for supporting said stator; aweatherproof cover attached to the upper end of said frame and coveringsaid means for supporting said rotor, said cover having an annular rim;and a jacket, said jacket having a cylin-, drical portion surroundingsaid rotorvso as to provide an annular space therearound, a radial wallresting on said frame and being secured thereto, and an annular flangeextending upward, from said radial wal-l and terminating beneath saidrim.

- 3. In combination: a stator; a rotor inside said stator; means forsupporting said rotor; a frame for supporting said stator; aweatherproof cover attached to the upper end of said frame and coveringsaid means for supportingsaid rotor, said cover having: an annular mm; aacket, said jacket havmg a cylindncal portion surrounding said stator soas to provide an annular space therearound, a rafor drawing air inwardthrough the lower I part of said frame and forcing it outward ,into saidannular space between said stator and said jacket; and an upper fan fordrawing air into said motor between said flange and said frame andforcing it outward into said annular space between said stator and saidjacket. I r

4. In combination: astator; a rotor inside vsaid stator; means forsupporting said rotor; a frame for supporting said stator and having aclosed upper end portion; a rim extending outwardly from and surroundingsaid closed upper end portion of said frame;

.and a jacket supported by said frame, said jacket surrounding saidstator and having I said frame, said jacket surrounding said stator andhaving an annular flange extending upward and terminating beneath saidrim; a lower fan for drawing air inward ing a closed upper end portion;a rim extending outwardly from said closed upper end portion of saidframe; and a jacket, said jacket having a cylindrical portionsurrounding said rotor so as to provide an annular space therearound, aradial wall resting on said frame and'being secured thereto, and anannular flange extending upward from said radial wall and terminatingbeneath said rim. 4

7. In combination: a stator; a rotor inside said stator; means forsupporting saidrotor; a frame for supporting said stator and having aclosed upper end portion; arimextending outwardly from said closed upperend portion of said frame; a jacket, said jacket having a cylindricalportion surrounding said rotor so as to provide an. annular spacetherearound, a radial wallresting on said frame and being securedthereto, and an annular flange extending upward from said radial walland terminating beneath said rim; a lower fanfor drawing air inwardthrough the lower part of said frame and forcing it outward into a spacebetween said rotor and said jacketfland an upper fan for,

drawing air into said motor between said flange and said frame andforcing it outward into said space between said rotor and said jacket. s

8. In combination in a motor: a frame; a stator mounted in said frame; arotor rotatably mounted in said frame; a cover se cured to the upper endof said frame and having an annular rim thereon; and a jacket securedtosaid frame and extending downward around said stator,'said jackethaving an upward extending flange terminating beneath said rim.

9. In combination with a vertical-shaft motor having a stator and arotor: a jacket extending downward around said motor, there being anannular space between said jacket and said stator which annular space isopen at the bottom; a weather-proof cover member providing adownward'extending rim; a flange extending upward from said' jacket to apoint inside said rim, said rim and said flange defining a' passagetherebetween; means for drawlng air through said passage and intocooling relationship with said motor, said air being discharged intosaid annular space; and means for drawing additional air into coolingrelationship with the lower portion of said motor, said air beingdischarged into said annular space.

10. In combination in a vertical-shaft motor: a stator; a rotor mountedto rotate adjacent said stator; a cover member above said stator andproviding a rim extending outward and downward; a jacket supported inspaced relationship with said stator and extending downward therearoundin protecting relationship to provide an annular space between theperiphery of said stator and said jacket, said annular spacecommunicating with the atmosphere at its lower end; an annular flangeassociated with said jacket and extending upward beneath said rim to provide an upward directed passage, the lower end of which communicateswith the atmosphere' and the upper end of which communicates with theinterior of said motor; and

means associated with said rotor for drawing-air through said upwarddirected passage and into cooling relationship with said rotor andstator, said air being discharged into said annular space.

11. In combination with a motor having an external surface and includinga stator and a rotor: a member extending downward and r around saidmotor and spaced from said external surface to provide an annular spacetherebetween, said member including a wall extending across and closingthe upper end of said annular space; and cooling means for across theupper portion of said stator; a,

rotor inside said stator; a cover member supported by said frame memberand providing a rim extending outward and downward from said framemember; a jacket supported by said frame and extending downward aroundsaid stator in protecting relationship therewith; and an annular flangeassociated with said jacket and extending upward beneath said rim toprovide an upward directed passage therebetween which communicates withthe interior of said motor; and means for forcing a streain of airthrough said passage. 13. In combination in a vertical-shaft motor: astator; a frame member extending across the upper end of said stator andincluding walls forming a bearing chamber; a shaft journaled in saidbearing chamber and? extending downward through said stator; a rotor onsaid shaft; a cover member including a rim extending outward from theupper end of said frame member; and an annular flange surrounding saidwalls and definingl a space therebetween communicating wit the interiorof said motor, said andrawing air into said motor to cool said statornular flange extending upward beneath said rim to provide an upwarddirected passage communicating at its lower end with the an mosphere andatitsupper end with sald space whereby air circulating through saidspace and. said passage cools bothv the interior of said motor and saidwalls forming said bearing chamber. In testimony whereof, I havehereunto set my hand at Los Angeles, California, this 10 day of Sept,1926.

. CARL E. JOHNSON.

